Pi4 relay case with fan and Wago 221 terminal blocks

thingiverse

Needed a case for my raspberry pi 4 and the Waveshare pi-relay board (https://www.waveshare.com/rpi-relay-board.htm) since there didn't seem to be any on the market I designed my own - here for anyone to use if it's helpful. I added mounts for a 40-mm fan (I've got a 10mm thick one fitted but there should be space for a 20mm thick one). I have a Geekworm Raspberry Pi 4 11mm heatsink fitted (https://geekworm.com/products/raspberry-pi-4-11mm-embedded-heatsink-p165-b - no fan since I have the one in the case) with 5mm M2.5 standoffs from underneath the pi into the heatsink (see CAD image). I screw through my case into these standoffs to mount the pi in the box. The relay board is fitted with 6mm M2.5 standoffs and M2.5 screws. The lid is attached with M4 X 10 cap screws (you'll need to tap these yourseself) I also included cable tie holes and recessess for 3-way Wago 221 connectors (https://www.wago.com/gb/electrical-interconnections/discover-installation-terminal-blocks-and-connectors/221) since I'm using the relay board to switch mains fans. I've allowed for 3x blocks (for L, N and E). Included STLs for printing and STPs in case anyone wants to make a varient.